diff options
Diffstat (limited to 'manual/conf.texi')
-rw-r--r-- | manual/conf.texi | 593 |
1 files changed, 591 insertions, 2 deletions
diff --git a/manual/conf.texi b/manual/conf.texi index 4f9326e9d4..64591ee9f2 100644 --- a/manual/conf.texi +++ b/manual/conf.texi @@ -236,7 +236,7 @@ always defines this as @code{1}, on the assumption that you had to have @deftypevr Macro {long int} _POSIX_VERSION This constant represents the version of the POSIX.1 standard to which the implementation conforms. For an implementation conforming to the -1990 POSIX.1 standard, the value is the integer @code{199009L}. +1995 POSIX.1 standard, the value is the integer @code{199506L}. @code{_POSIX_VERSION} is always defined (in @file{unistd.h}) in any POSIX system. @@ -368,6 +368,294 @@ Inquire about the parameter corresponding to @code{CLOCKS_PER_SEC}; @pxref{Basic CPU Time}. @comment unistd.h +@comment GNU +@item _SC_CHARCLASS_NAME_MAX +Inquire about the parameter corresponding to maximal length allowed for +a character class name in an extended locale specification. These +extensions are not yet standardized and so this option is not standardized +as well. + +@comment unistdh.h +@comment POSIX.1 +@item _SC_REALTIME_SIGNALS +Inquire about the parameter corresponding to @code{_POSIX_REALTIME_SIGNALS}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_PRIORITY_SCHEDULING +Inquire about the parameter corresponding to @code{_POSIX_PRIORITY_SCHEDULING}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_TIMERS +Inquire about the parameter corresponding to @code{_POSIX_TIMERS}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_ASYNCHRONOUS_IO +Inquire about the parameter corresponding to @code{_POSIX_ASYNCHRONOUS_IO}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_PRIORITIZED_IO +Inquire about the parameter corresponding to @code{_POSIX_PRIORITIZED_IO}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_SYNCHRONIZED_IO +Inquire about the parameter corresponding to @code{_POSIX_SYNCHRONIZED_IO}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_FSYNC +Inquire about the parameter corresponding to @code{_POSIX_FSYNC}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_MAPPED_FILES +Inquire about the parameter corresponding to @code{_POSIX_MAPPED_FILES}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_MEMLOCK +Inquire about the parameter corresponding to @code{_POSIX_MEMLOCK}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_MEMLOCK_RANGE +Inquire about the parameter corresponding to @code{_POSIX_MEMLOCK_RANGE}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_MEMORY_PROTECTION +Inquire about the parameter corresponding to @code{_POSIX_MEMORY_PROTECTION}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_MESSAGE_PASSING +Inquire about the parameter corresponding to @code{_POSIX_MESSAGE_PASSING}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_SEMAPHORES +Inquire about the parameter corresponding to @code{_POSIX_SEMAPHORES}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_SHARED_MEMORY_OBJECTS +Inquire about the parameter corresponding to +@code{_POSIX_SHARED_MEMORY_OBJECTS}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_AIO_LISTIO_MAX +Inquire about the parameter corresponding to @code{_POSIX_AIO_LISTIO_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_AIO_MAX +Inquire about the parameter corresponding to @code{_POSIX_AIO_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_AIO_PRIO_DELTA_MAX +Inquire the value by which a process can decrease its asynchronous I/O +priority level from its own scheduling priority. This corresponds to the +run-time invariant value @code{AIO_PRIO_DELTA_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_DELAYTIMER_MAX +Inquire about the parameter corresponding to @code{_POSIX_DELAYTIMER_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_MQ_OPEN_MAX +Inquire about the parameter corresponding to @code{_POSIX_MQ_OPEN_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_MQ_PRIO_MAX +Inquire about the parameter corresponding to @code{_POSIX_MQ_PRIO_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_RTSIG_MAX +Inquire about the parameter corresponding to @code{_POSIX_RTSIG_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_SEM_NSEMS_MAX +Inquire about the parameter corresponding to @code{_POSIX_SEM_NSEMS_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_SEM_VALUE_MAX +Inquire about the parameter corresponding to @code{_POSIX_SEM_VALUE_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_SIGQUEUE_MAX +Inquire about the parameter corresponding to @code{_POSIX_SIGQUEUE_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_TIMER_MAX +Inquire about the parameter corresponding to @code{_POSIX_TIMER_MAX}. + +@comment unistd.h +@comment POSIX.1g +@item _SC_PII +Inquire about the parameter corresponding to @code{_POSIX_PII}. + +@comment unistd.h +@comment POSIX.1g +@item _SC_PII_XTI +Inquire about the parameter corresponding to @code{_POSIX_PII_XTI}. + +@comment unistd.h +@comment POSIX.1g +@item _SC_PII_SOCKET +Inquire about the parameter corresponding to @code{_POSIX_PII_SOCKET}. + +@comment unistd.h +@comment POSIX.1g +@item _SC_PII_INTERNET +Inquire about the parameter corresponding to @code{_POSIX_PII_INTERNET}. + +@comment unistd.h +@comment POSIX.1g +@item _SC_PII_OSI +Inquire about the parameter corresponding to @code{_POSIX_PII_OSI}. + +@comment unistd.h +@comment POSIX.1g +@item _SC_SELECT +Inquire about the parameter corresponding to @code{_POSIX_SELECT}. + +@comment unistd.h +@comment POSIX.1g +@item _SC_UIO_MAXIOV +Inquire about the parameter corresponding to @code{_POSIX_UIO_MAXIOV}. + +@comment unistd.h +@comment POSIX.1g +@item _SC_PII_INTERNET_STREAM +Inquire about the parameter corresponding to @code{_POSIX_PII_INTERNET_STREAM}. + +@comment unistd.h +@comment POSIX.1g +@item _SC_PII_INTERNET_DGRAM +Inquire about the parameter corresponding to @code{_POSIX_PII_INTERNET_DGRAM}. + +@comment unistd.h +@comment POSIX.1g +@item _SC_PII_OSI_COTS +Inquire about the parameter corresponding to @code{_POSIX_PII_OSI_COTS}. + +@comment unistd.h +@comment POSIX.1g +@item _SC_PII_OSI_CLTS +Inquire about the parameter corresponding to @code{_POSIX_PII_OSI_CLTS}. + +@comment unistd.h +@comment POSIX.1g +@item _SC_PII_OSI_M +Inquire about the parameter corresponding to @code{_POSIX_PII_OSI_M}. + +@comment unistd.h +@comment POSIX.1g +@item _SC_T_IOV_MAX +Inquire the value of the value associated with the @code{T_IOV_MAX} +variable. + +@comment unistd.h +@comment POSIX.1 +@item _SC_THREADS +Inquire about the parameter corresponding to @code{_POSIX_THREADS}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_THREAD_SAFE_FUNCTIONS +Inquire about the parameter corresponding to +@code{_POSIX_THREAD_SAFE_FUNCTIONS}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_GETGR_R_SIZE_MAX +Inquire about the parameter corresponding to @code{_POSIX_GETGR_R_SIZE_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_GETPW_R_SIZE_MAX +Inquire about the parameter corresponding to @code{_POSIX_GETPW_R_SIZE_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_LOGIN_NAME_MAX +Inquire about the parameter corresponding to @code{_POSIX_LOGIN_NAME_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_TTY_NAME_MAX +Inquire about the parameter corresponding to @code{_POSIX_TTY_NAME_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_THREAD_DESTRUCTOR_ITERATIONS +Inquire about the parameter corresponding to +@code{_POSIX_THREAD_DESTRUCTOR_ITERATIONS}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_THREAD_KEYS_MAX +Inquire about the parameter corresponding to @code{_POSIX_THREAD_KEYS_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_THREAD_STACK_MIN +Inquire about the parameter corresponding to @code{_POSIX_THREAD_STACK_MIN}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_THREAD_THREADS_MAX +Inquire about the parameter corresponding to @code{_POSIX_THREAD_THREADS_MAX}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_THREAD_ATTR_STACKADDR +Inquire about the parameter corresponding to +@code{_POSIX_THREAD_ATTR_STACKADDR}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_THREAD_ATTR_STACKSIZE +Inquire about the parameter corresponding to +@code{_POSIX_THREAD_ATTR_STACKSIZE}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_THREAD_PRIORITY_SCHEDULING +Inquire about the parameter corresponding to +@code{_POSIX_THREAD_PRIORITY_SCHEDULING}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_THREAD_PRIO_INHERIT +Inquire about the parameter corresponding to @code{_POSIX_THREAD_PRIO_INHERIT}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_THREAD_PRIO_PROTECT +Inquire about the parameter corresponding to @code{_POSIX_THREAD_PRIO_PROTECT}. + +@comment unistd.h +@comment POSIX.1 +@item _SC_THREAD_PROCESS_SHARED +Inquire about the parameter corresponding to +@code{_POSIX_THREAD_PROCESS_SHARED}. + +@comment unistd.h @comment POSIX.2 @item _SC_2_C_DEV Inquire about whether the system has the POSIX.2 C compiler command, @@ -465,6 +753,212 @@ support. Inquire about the virtual memory page size of the machine. @code{getpagesize} returns the same value. @c @xref{XXX getpagesize}. !!! ??? + +@comment unistd.h +@comment GNU +@item _SC_NPROCESSORS_CONF +Inquire about number of configured processors. + +@comment unistd.h +@comment GNU +@item _SC_NPROCESSORS_ONLN +Inquire about number of processors online. + +@comment unistd.h +@comment GNU +@item _SC_PHYS_PAGES +Inquire about number of physical pages in the system. + +@comment unistd.h +@comment GNU +@item _SC_AVPHYS_PAGES +Inquire about number of available physical pages in the system. + +@comment unistd.h +@comment GNU +@item _SC_ATEXIT_MAX +Inquire about number of functions which can be registered as termination +functions for @code{atexit}; @pxref{Cleanups on Exit}. + +@comment unistd.h +@comment X/Open +@item _SC_XOPEN_VERSION +Inquire about the parameter corresponding to @code{_XOPEN_VERSION}. + +@comment unistd.h +@comment X/Open +@item _SC_XOPEN_XCU_VERSION +Inquire about the parameter corresponding to @code{_XOPEN_XCU_VERSION}. + +@comment unistd.h +@comment X/Open +@item _SC_XOPEN_UNIX +Inquire about the parameter corresponding to @code{_XOPEN_UNIX}. + +@comment unistd.h +@comment X/Open +@item _SC_XOPEN_CRYPT +Inquire about the parameter corresponding to @code{_XOPEN_CRYPT}. + +@comment unistd.h +@comment X/Open +@item _SC_XOPEN_ENH_I18N +Inquire about the parameter corresponding to @code{_XOPEN_ENH_I18N}. + +@comment unistd.h +@comment X/Open +@item _SC_XOPEN_SHM +Inquire about the parameter corresponding to @code{_XOPEN_SHM}. + +@comment unistd.h +@comment X/Open +@item _SC_XOPEN_XPG2 +Inquire about the parameter corresponding to @code{_XOPEN_XPG2}. + +@comment unistd.h +@comment X/Open +@item _SC_XOPEN_XPG3 +Inquire about the parameter corresponding to @code{_XOPEN_XPG3}. + +@comment unistd.h +@comment X/Open +@item _SC_XOPEN_XPG4 +Inquire about the parameter corresponding to @code{_XOPEN_XPG4}. + +@comment unistd.h +@comment X/Open +@item _SC_CHAR_BIT +Inquire about number of bits in a variable of type @code{char}. + +@comment unistd.h +@comment X/Open +@item _SC_CHAR_MAX +Inquire about maximum value which can be stored in a variable of type +@code{char}. + +@comment unistd.h +@comment X/Open +@item _SC_CHAR_MIN +Inquire about minimum value which can be stored in a variable of type +@code{char}. + +@comment unistd.h +@comment X/Open +@item _SC_INT_MAX +Inquire about maximum value which can be stored in a variable of type +@code{int}. + +@comment unistd.h +@comment X/Open +@item _SC_INT_MIN +Inquire about minimum value which can be stored in a variable of type +@code{int}. + +@comment unistd.h +@comment X/Open +@item _SC_LONG_BIT +Inquire about number of bits in a variable of type @code{long int}. + +@comment unistd.h +@comment X/Open +@item _SC_WORD_BIT +Inquire about number of bits in a variable of a register word. + +@comment unistd.h +@comment X/Open +@item _SC_MB_LEN_MAX +Inquire the maximum length of a multi-byte representation of a wide +character value. + +@comment unistd.h +@comment X/Open +@item _SC_NZERO +Inquire value used to internally represent the zero priority level for +the process execution. + +@comment unistd.h +@comment X/Open +@item SC_SSIZE_MAX +Inquire about maximum value which can be stored in a variable of type +@code{ssize_t}. + +@comment unistd.h +@comment X/Open +@item _SC_SCHAR_MAX +Inquire about maximum value which can be stored in a variable of type +@code{signed char}. + +@comment unistd.h +@comment X/Open +@item _SC_SCHAR_MIN +Inquire about minimum value which can be stored in a variable of type +@code{signed char}. + +@comment unistd.h +@comment X/Open +@item _SC_SHRT_MAX +Inquire about maximum value which can be stored in a variable of type +@code{short int}. + +@comment unistd.h +@comment X/Open +@item _SC_SHRT_MIN +Inquire about minimum value which can be stored in a variable of type +@code{short int}. + +@comment unistd.h +@comment X/Open +@item _SC_UCHAR_MAX +Inquire about maximum value which can be stored in a variable of type +@code{unsigned char}. + +@comment unistd.h +@comment X/Open +@item _SC_UINT_MAX +Inquire about maximum value which can be stored in a variable of type +@code{unsigned int}. + +@comment unistd.h +@comment X/Open +@item _SC_ULONG_MAX +Inquire about maximum value which can be stored in a variable of type +@code{unsigned long int}. + +@comment unistd.h +@comment X/Open +@item _SC_USHRT_MAX +Inquire about maximum value which can be stored in a variable of type +@code{unsigned short int}. + +@comment unistd.h +@comment X/Open +@item _SC_NL_ARGMAX +Inquire about the parameter corresponding to @code{NL_ARGMAX}. + +@comment unistd.h +@comment X/Open +@item _SC_NL_LANGMAX +Inquire about the parameter corresponding to @code{NL_LANGMAX}. + +@comment unistd.h +@comment X/Open +@item _SC_NL_MSGMAX +Inquire about the parameter corresponding to @code{NL_MSGMAX}. + +@comment unistd.h +@comment X/Open +@item _SC_NL_NMAX +Inquire about the parameter corresponding to @code{NL_NMAX}. + +@comment unistd.h +@comment X/Open +@item _SC_NL_SETMAX +Inquire about the parameter corresponding to @code{NL_SETMAX}. + +@comment unistd.h +@comment X/Open +@item _SC_NL_TEXTMAX +Inquire about the parameter corresponding to @code{NL_TEXTMAX}. @end table @node Examples of Sysconf @@ -522,6 +1016,23 @@ system you are using can go that far. @table @code @comment limits.h @comment POSIX.1 +@item _POSIX_AIO_LISTIO_MAX +The most restrictive limit permitted by POSIX for the maximum number of +I/O operations that can be specified in a list I/O call. The value of +this constant is @code{2}; thus you can add up to two new entries +of the list of outstandard operations. + +@comment limits.h +@comment POSIX.1 +@item _POSIX_AIO_MAX +The most restrictive limit permitted by POSIX for the maximum number of +outstanding asynchronous I/O operations. The value of this constant is +@code{1}. So you cannot expect that you can issue more than one +operation and immediately continue with the normal work, receiving the +notifications asynchronously. + +@comment limits.h +@comment POSIX.1 @item _POSIX_ARG_MAX The value of this macro is the most restrictive limit permitted by POSIX for the maximum combined length of the @var{argv} and @var{environ} @@ -732,7 +1243,9 @@ particular file, call @code{pathconf} or @code{fpathconf}. Here are the names for the POSIX minimum upper bounds for some of the above parameters. The significance of these values is that you can safely push to these limits without checking whether the particular -system you are using can go that far. +system you are using can go that far. In most cases GNU systems do not +have these strict limitations. The actual limit should be requested if +necessary. @table @code @comment limits.h @@ -883,6 +1396,26 @@ Inquire about the value of @code{_POSIX_NO_TRUNC}. @comment POSIX.1 @item _PC_VDISABLE Inquire about the value of @code{_POSIX_VDISABLE}. + +@comment unistd.h +@comment POSIX.1 +@item _PC_SYNC_IO +Inquire about the value of @code{_POSIX_SYNC_IO}. + +@comment unistd.h +@comment POSIX.1 +@item _PC_ASYNC_IO +Inquire about the value of @code{_POSIX_ASYNC_IO}. + +@comment unistd.h +@comment POSIX.1 +@item _PC_PRIO_IO +Inquire about the value of @code{_POSIX_PRIO_IO}. + +@comment unistd.h +@comment POSIX.1g +@item _PC_SOCK_MAXBUF +Inquire about the value of @code{_POSIX_PIPE_BUF}. @end table @node Utility Limits @@ -1064,6 +1597,62 @@ Currently there is just one parameter you can read with @code{confstr}: This parameter's value is the recommended default path for searching for executable files. This is the path that a user has by default just after logging in. + +@comment unistd.h +@comment Unix98 +@item _CS_LFS_CFLAGS +The returned string specifies which additionals flags must be given to +the C compiler if a source is compiled using the +@code{_LARGEFILE_SOURCE} feature select macro; @pxref{Feature Test Macros}. + +@comment unistd.h +@comment Unix98 +@item _CS_LFS_LDFLAGS +The returned string specifies which additionals flags must be given to +the linker if a source is compiled using the +@code{_LARGEFILE_SOURCE} feature select macro; @pxref{Feature Test Macros}. + +@comment unistd.h +@comment Unix98 +@item _CS_LFS_LIBS +The returned string specifies which additionals libraries must be linked +to the application if a source is compiled using the +@code{_LARGEFILE_SOURCE} feature select macro; @pxref{Feature Test Macros}. + +@comment unistd.h +@comment Unix98 +@item _CS_LFS_LINTFLAGS +The returned string specifies which additionals flags must be given to +the the lint tool if a source is compiled using the +@code{_LARGEFILE_SOURCE} feature select macro; @pxref{Feature Test Macros}. + +@comment unistd.h +@comment Unix98 +@item _CS_LFS64_CFLAGS +The returned string specifies which additionals flags must be given to +the C compiler if a source is compiled using the +@code{_LARGEFILE64_SOURCE} feature select macro; @pxref{Feature Test Macros}. + +@comment unistd.h +@comment Unix98 +@item _CS_LFS64_LDFLAGS +The returned string specifies which additionals flags must be given to +the linker if a source is compiled using the +@code{_LARGEFILE64_SOURCE} feature select macro; @pxref{Feature Test Macros}. + +@comment unistd.h +@comment Unix98 +@item _CS_LFS64_LIBS +The returned string specifies which additionals libraries must be linked +to the application if a source is compiled using the +@code{_LARGEFILE64_SOURCE} feature select macro; @pxref{Feature Test Macros}. + +@comment unistd.h +@comment Unix98 +@item _CS_LFS64_LINTFLAGS +The returned string specifies which additionals flags must be given to +the the lint tool if a source is compiled using the +@code{_LARGEFILE64_SOURCE} feature select macro; @pxref{Feature Test Macros}. @end table The way to use @code{confstr} without any arbitrary limit on string size |